moini.net - Jim Moini's License Plates
SCHOOL VEHICLES (BLUE BACK) When NJ converted from the blue plates to the graphic plates in 1991/1992, there were some unused blue plate blanks left over.
Reflective sheeting was applied to the blue blanks, so we have some reflective plates with a blue painted back.
W-S1 - Z-S1
5916AS1 has an unpainted aluminum back.
The blue back school vehicle plates appear to have started after the 7-digit series ended, so the first S1 plate was probably 100W-S1.
Even though I have only seen one plate in this series, we would assume the entire range 100W-S1 through 999Z-S1 had blue backs.


New Jersey License Plate

photoshop
New Jersey License Plate

S1-A - S1-K
The blue backs continue from S1-A100 through the S1-K series.


New Jersey License Plate


New Jersey License Plate


New Jersey License Plate


New Jersey License Plate



New Jersey License Plate

photoshop
New Jersey License Plate


The blue backs probably stopped at the changeover to the avery base.
If this is the case, S1-L100 was the first plate with an aluminum back.
(S1-L961 verified with an aluminum back.)
N-S2 - Z-S2
5265AS2 has a regular silver back.
The first blue back plate in the S2 series was probably 100N-S2 (this would have been the first one after the 7-digit series ended).
They continued through 999Z-S2.


New Jersey License Plate


New Jersey License Plate


New Jersey License Plate


New Jersey License Plate

S2-A
The S2-A series was also made with blue backs.


New Jersey License Plate


New Jersey License Plate


The Avery base atarted at S2-B100. This is probably where the blue backs stopped.
(S2-C488 verified with an unpainted aluminum back.)